Pressure-type tablet hypochlorinating device

ABSTRACT

A water chlorinating apparatus adapted to be connected to a pipe having water flowing therethrough under pressure of up to 100 lbs/sq. inch including valves and conduits for diverting a portion of the water flow into the chlorinating unit containing the chlorinating material and for conducting chlorinated water back to the pipe. The chlorinating unit comprises a base having an inlet and an outlet, an upstanding tube communicating with the inlet and a container, the container having a lower surface supporting the chlorinating tablets and a plurality of orifices in the container wall just above the lower surface and communicating with the outlet. A distributor head in the container directs streams of water flowing from the upstanding tube into contact with the tablets resting on the lower surface adjacent the orifices to dissolve the tablets. A weir is located in the base of the unit for diverting the water flow to the tablets, the weir having an adjustable by-pass orifice for varying the dosage of hypochlorite. A drain pipe and valve are provided to allow replenishment of the tablets without interruption of the water flow in the pipe.

United States Patent 1 [111 3,864,090

Richards Feb. 4, 1975 1 1 PRESSURE-TYPE TABLET Primary Examiner-WilburL. Bascomb, Jr.

HYPOCHLORINATING DEVICE [76] Inventor: Kenneth Richards, P.O. Box 17,

Gordon Town, Parish of St. Andrews, Jamaica, British W. Indies [22]Filed: Oct. 12, 1973 [21] App]. No.: 405,769

[52] U.S. Cl. 23/267 E, 23/272.7, 23/272.8, 239/310, 239/317, 137/268,210/169 [51] Int. Cl B01d 11/02 [58] Field of Search 23/267 B, 272.7,272.8; 137/268; 210/169; 239/310, 317

[56] References Cited UNITED STATES PATENTS 1,335,802 4/1920 Stewart23/267 E 1,409,248 3/1922 Sevcils 23/272.8 1,740,879 12/1929 Sonner...23/272.8 1,767,841 6/1930 Fisher.... 299/84 1,967,909 7/1934 Sonner...23/272.8 2,521,802 9/1950 Otto 23/272.7 2,758,877 8/1956 Gleason23/272.7

Assistant Examiner-S. J. Emery Attorney, Agent, or Firm-Roylance,Abrams, Berdo & Kaul [57] ABSTRACT A water chlorinating apparatusadapted to be connected to a pipe having water flowing therethroughunder pressure of up to 100 lbs/sq. inch including valves and conduitsfor diverting a portion of the water flow into the chlorinating unitcontaining the chlorinating material and for conducting chlorinatedwater back to the pipe. The chlorinating unit comprises a base having aninlet and an outlet, an upstanding tube communicating with the inlet anda container, the container having a lower surface supporting thechlorinating tablets and a plurality of orifices in the container walljust above the lower surface and communicating with the outlet. Adistributor head in the container directs streams of water flowing fromthe upstanding tube into contact with the tablets resting on the lowersurface adjacent the orifices to dissolve the tablets. A weir is locatedin the base of the unit for diverting the water flow to the tablets, theweir having an adjustable by-pass orifice for varying the dosage ofhypochlorite. A drain pipe and valve are provided to allow replenishmentof the tablets without interruption of the water flow in the pipe.

10 Claims, 2 Drawing Figures PRESSURE-TYPE TABLET HYPOCHLORINATINGDEVICE This invention relates to a unit for chlorinating water flowingunder a pressure of up to 100 lbs/sq. inch in a pipe. More particularly,this invention relates to a new and improved chlorinating unit using ahypochlorite supply, in tablet form, wherein the tablets are graduallydissolved to provide a hypochlorite solution to water flowing in a pipe.

It has been found desirable to chlorinate water flowing in a water pipeunder pressure for reasons of sanitation and to prevent the water frombecoming contaminated and diseased. In the past there have been certainproposals and devices which were intended to accomplish the samefunctions as that of the present invention, but in actual practice, suchdevices and proposals were found to be unsatisfactory. Such priordevices for providing hypochlorite in tablet form to water pipesresulted in a loss of. water pressure in the flow and the addednecessity of using power-operated pumps to compensate for the pressureloss. Additionally, such prior devices and proposals were characterizedby difficulties in adjusting hypochlorite dosages as required byvariations in flow without frequent manual adjustment and werecharacterized by a clogging of the systems lines by lime deposits. Also,some of the systems necessitated a frequent replenishment of the tabletsand an interruption of the flow of the water during such replenishment.

With the foregoing in mind, it is, therefore, a primary object of thepresent invention to overcome the difficulties and deficienciesassociated with the prior art units of this type, and to provide a newand improved unit for chlorinating water flowing in a water pipe ormain.

Another object of the present invention is to provide a chlorinatingunit which operates reliably and allows the dosage of hypochlorite to beeasily and accurately adjusted so that it automatically provides thedesired dosage at variable rates of water flow.

Another object of the present invention is to provide a chlorinatingunit capable of chlorinating a flow of water within a water pipe underhigh pressure.

Another object of the present invention is to provide a chlorinatingunit capable of providing hypochlorite solution to water flowing in apipe without a substantial loss of pressure and without the additionaluse of an auxiliary pump.

Another object of the present invention is to provide a chlorinatingunit wherein the chlorine tablets can be replenished or the unitserviced without interrupting the flow of water in the pipe.

Other objects, advantages and salient features of the present inventionwill become apparent from the following detailed description, which,taken in conjunction with the annexed drawings, discloses a preferredembodiment thereof.

In general, the invention resides in a new and improved chlorinatingunit adapted to be interconnected to a pipe or high-pressure water mainthrough which water is flowing. A first conduit carries a portion of thewater from the water main into a container in the unit which carries thehypochlorite tablets. In the container the water dissolves the tabletsto form a chlorinated solution. A second conduit carries the chlorinatedsolution from the container back to the water main. A valve is locatedin the water main between the connection with the main of the first andsecond conduits for diverting a portion of the water flow into the unit.The chlorinating unit, which is interposed between the first and secondconduits, is comprised of a base, an upstanding tube, a container forthe tablets, and a plastic dome mounted to the base and enclosing thetube and the container. An inlet bore within the base communicates withthe first conduit and the upstanding tube and allows water entering theunit to flow through the tube and into contact with the tablets in thecontainer to dissolve a portion of them to form the chlorinatedsolution. A discharge chamber within the base communicates with orificesin the container wall and the second conduit and receives thechlorinated solution exiting from the orifices. A weir is located at oneend of the inlet bore to divert the flow of water entering the inletbore to the upstanding tube. An adjustable bypass orifice is located inthe weir to vary the hypochlorite dosage by allowing some of the waterflowing into the upstanding tube to flow directly into the dischargechamber without contacting the tablets. Referring now to the drawingswhich form a part of this original disclosure:

FIG. 1 is a top plan view, partially in section, of a chlorinating unitin accordance with the principles of the present invention, shownconnected to a highpressure water main; and

FIG. 2 is an elevational view, partially in section, of the chlorinatingunit.

Referring now to the drawings, as seen in FIG. 1, the chlorinating unit10 is connected to the high pressure water main by an inflow firstconduit 60 and a return flow second conduit 70. The water flowing in thewater main 80 approaches the region of the chlorinating unit 10 alongthe pipe 82, which is connected to the inlet 84 in a first reducing teefitting 86 having a branch 87 with an outlet 88 to the first conduit 60and an outlet 90 to a short pipe 92, which leads to a valve 94. Theother side of the valve 94 is connected to another short pipe 96 whichis connected to an inlet 98 in a second expanding fitting tee 100,having an inlet 102 in the branch 103 receiving the second conduit 70and an outlet 104 to a pipe 106 in the water main 80.

The first conduit 60 is comprised of a pipe 108 communicating with thefirst outlet 88 in the first tee 86, a union 110 between the pipe 108and the pipe 112, a stopcock valve 114 between pipes 112 and 116, and athird tee fitting 118. This tee fitting has three openings, 120, 122 and124, with opening communicating with the pipe 116, opening 124communicating with a tractor tire valve 126, and opening 122communicating with a male adaptor pipe 128 which fits into an inlet 26in the chlorinating unit 10.

An outlet 36 in the chlorinating unit 10 is fitted with a male adaptorpipe 130 which connects with an inlet 132 in a fourth tee fitting 134having two outlets, 136 and 138. The outlet 136 is connected through apipe 140 to a stopcock valve 142 which is further connected to a drainpipe 144. The outlet 138 in the fourth tee 134 is connected to an inlet146 in a fifth tee fitting 148 through a male adaptor pipe 150. Anoutlet 152 in the fifth tee 148 is connected to a pipe 154 which is inturn connected to a union 156 and a pipe 158 which communicates with theinlet 103 in the second tee 100 in the water main 80. The water main 80leaves the region of the chlorinating unit via pipe 106 which isconnected to the outlet 104 in the second tee 100.

A non-return valve 160 is formed in the second conduit 70 by providing aspring biased plug over the open end of the male adaptor pipe 150 in thefifth tee 148, which open end is beveled to form a valve seat. The tee148 has threads on the interior surface at its end near outlet 162 forthe reception of a short tube 164 threaded at its mid-portion and havingreduced diameter end portions. The outer end portion has a bushing 166welded around it, the end portion and the bushing being covered by a cap168 welded thereto. Supported on the inside of the cap is a stainlesssteel spring 170 which is connected to a perspex rod 172 which has anenlarged plug or half round rubber tap washer 174 fit-- ted on itsreduced end which is biased into a covering engagement with the beveledopening in the male adaptor pipe 150. The valve is made water-tight byproviding an O-ring 176 between the rim of the cap 168 and a sleeve 178welded to the surface of the fith tee 148 As seen in FIG. 2, thechlorinating unit consists of a base 12, an upstanding tube 14, acontainer -16 and a transparent plastic dome 18 oriented in an uprightposition. The container 16 carries a supply of hypochlorite tablets 15.

The base 12 which is formed from a suitable plastic material,non-reactive with a hypochlorite solution, is essentially a rightcylinder having an open top end 20 and a closed bottom end 22. The upperportion of the interior cylindrical surface of the base wall is threadedfor receiving corresponding threads on the outside of the bottom of thedome or accumulator l8. Extending vertically from the closed end 22 toimmediately below the threaded portion of the base is a raised portionor land 24 filling only a portion of the enclosed volume of thecylindrical base 12. A cylindrical inlet bore 26 passes perpendicularlythrough the exterior cylindrical surface of the base 12 and through theland 24, terminating short of an end wall or weir 28 in the land. Thetop of the land 24 has a vertically formed, cylindrical bore 30 thereinadjacent to the weir and communicating with the inlet bore 26, whichvertical bore is substantially along the longitudinal axis of thecylindrical base 12.

Passing through the weir 28, substantially prallel to the plane of theclosed end 22 of the base and having one end communicating with thevertical bore 30, is a by-pass orifice 32 which has its other endcommunicating with a discharge chamber 34 located on the opposite sideof the weir from the inlet bore 26. The discharge chamber 34communicates with a cylindrical outlet bore 36 in the exteriorcylindrical surface of the cylindrical base 12, which outlet isdiametrically opposed to the inlet bore 26.

Welded within the vertical bore 30 is a short pipe or sleeve 38 havingthreads on the inside surface thereof corresponding to and receivingthreads on the exterior surface ofa short tube or polyvinyl chloridemale adaptor 40. An aperture 42 in the wall of the tube 40 and anaperture 44 in the wall of the sleeve 38 are provided to coincide withthe by-pass orifice 32 in the weir 28. A rotation of the tube 40relative to the sleeve 38 can increase or decrease the effectivecross-sectional area of the by-pass orifice 32.

The upper portion of the wall of the short tube 40 is reduced inthickness to form a shoulder for the reception of one end of theupstanding tube 14, preferably formed from polyvinyl chloride. The otherend of the tube 14 is fitted snugly into the lower portion of the insideof a short tube or polyvinyl chloride female adaptor 46 which hasthreads along the interior of a reduced diameter upper portion thereof.

The container 16 is preferably formed from plastic material, such asthat sold under the trademark Perpex which is an acrylic plasticconsisting essentially of polymerized methyl methacrylate. The container16 is essentially a right cylinder having an open end 48 and a closedend 50 having a central bore 52 therein which receives the reduceddiameter portion of the tube 46. Hence, the container 16 tests on theshoulder formed by the reduced diameter portion of the tube 46. Asupport surface 54 in the form of an annulus with an outer diametersubstantially equal to the diameter of the container 16 is supportedabove the bottom end 50 on a circular shoulder 56 located within thecontainer 16 along the inner perimeter thereof. The tablets 15 rest onthis support surface 54, which can be formed of the same material asthat of the container 16.

A distributor head 64 for the unit is formed by a conical portion 65which is disposed above the support surface 54 and a depending tubeportion 67 which projects through a central aperture in the supportsurface 54. The depending tube portion 67 has external threadscorresponding to and engaging the interior threads of the tube 52. Aseries of bores 66 are provided in the conical section 65 of thedistributor head 64, which bores communicate with the interior of thetubular por' tion 67. The base of the conical element 64 lies on thesupport surface 54. Angularly spaced along the container wall and insubstantially the same horizontal plane as the head 64 are a pluralityof elongated orifices 68 which are located with their lowermost portionsat the top of the support surface 54.

Completely enclosing the container 16, the upstanding tube 14, the land24, and the discharge chamber 34 is the dome or accumulator 18 made fromtransparent plastic and mounted to the base at its bottom by a threadedconnection. That connection is made watertight by the use of an O-ring69.

The outer portion of the inlet bore 26 in the base 12 is threaded toreceive the male adaptor 128 which is also connected to opening 122 inthe third tee 118. Similarly, the outer portion of the outlet bore 36 isthreaded to receive a male adaptor 130 which also fits into the fourthtee 134. Both connections have O-rings 71 for providing a fluid-tightconnection.

In operation, hypochlorite tablets 15 are placed in the container 16covering the lower support surface 54. The by-pass orifice 32 isadjusted to provide for flow therethrough by rotating the tube 40carrying an aperture 44 relative to the tube 38 carrying the aperture42, to thus achieve the desired effective cross-section of and flow ratethrough the by-pass orifice 32. Then the plastic dome or accumulator 18is placed over the container 16 and screwed on to the base 12 with anO-ring 69 making the connection liquid and airtight.

The valve 94 in the water main is initially in a fully open position andvalve 114 in the first conduit 60 is in a fully closed position. Thevalve 142 leading to the drain pipe 144 is additionally in a fullyclosed position.

With water flowing through the water main 80 under pressure, the valve114 is gradually opened. This gradual opening prevents the possibilityof a surge of water from entering the chlorinating unit 10. When valve114 is fully opened, the valve 94 is gradually closed to divert aportion of the water flow through pipe 82 into the first conduit 60. Thewater not diverted continues through the valve 94 and into the secondtee 100.

The water that flows through the first conduit enters the inlet bore 26in the base 12 and flows therethrough until it contacts the weir 28, atwhich time it is diverted upwards into the upstanding tube 14. A portionof the water in the tube 14 flows through apertures 42 and 44 and theby-pass orifice 32 and directly into the discharge chamber 34. Anotherportion of the water flows up the tube 14 and into the orifices 66located in the distributor head 64. The water flowing therethrough isdirected from the bores 66 into contact with the hypochlorite tablets 15located adjacent the orifices 68 on the support surface 54 in thecontainer 16. The contact of the water with the tablets lying lowermostin the container results in a dissolving of a portion of the tablets,such dissolved portion being carried by the water out of the container16 through the orifices 68. The undissolved tablets located immediatelyabove the dissolving tablets continuously move downwards and occupy thespace above the support surface vacated by the dissolved tablets.

After the chlorinated solution exits through the orifices 68, it flowsdownward under the force of gravity and accumulates in the dischargechamber 34 and the dome 18. Here he chlorinated solution is diluted bymixing with the water passing directly into the discharge chamber 34from the inlet bore 26 via the bypass orifice 32. This dilutechlorinated solution then flows out the outlet bore 36 in the base 12into the second conduit 70 and back into the water main 80 through thesecond tee 100 and the pipe 106. In this manner, the chlorinatedsolution is further diluted in the second tee 100 as it mixes with theundiverted portion of the water flowing through the valve 94 andentering the second tee 100. The non-return valve 160 in the fifth tee148 prevents a backflow of water from the water main 80 into thechlorinating unit 10.

Since the unit is pressurized by the dome 18,-a certain amount of air istrapped in the dome. This air usually has enough pressure to prevent abuild-up of water in the dome to a height which would submerge thetablets in the container 16. If the pressure is not sufficient,additional air can be pumped into the dome via the valve 126 in thethird tee 118.

The water flowing in the pipe 106 and leaving the region of thechlorinating unit is tested to determine the hypochlorite concentrationin order that the dosage of hypochlorite may be adjusted in thechlorinating unit 10.

This adjustment may be accomplished in two alternative ways. The firstway is by manipulating the valve 94 to cause more or less water to flowinto the chlorinating unit 10 from the water main 80, and toconcommitantly dissolve more or less of the tablets. The second way isto vary the cross-sectional area of the by-pass orifice 32. This isaccomplished by closing the valve 114, opening the valve 142, removingthe dome l8, and rotating the tube 40 relative to the sleeve 38. Thisrotation moves the aperture 44 in the tube 40 relative to the aperture42 in the sleeve 38. This reduces or increases the cross-sectional areaof the by-pass orifice 32. A larger cross'sectional area allows morewater to flow therethrough and less to proceed up the upstanding tube 14to dissolve tablets, and therefore a smaller dosage is provided. If theby-pass orifice is made smaller in cross-section, then more water flowsup the tube 14 and dissolves more of the tablets, therefore providing anincrease in the concentration of the hypochlorite solution deliveredfrom the chlorinating unit 10 to the water main 80. a 5 In order toreplenish the supply of hypochlorite tablets in the container 16, thevalve 114 in the first conduit 60 is closed and the valve 142 leading tothe drain pipe 144 is opened. This allows all of the fluid in thechlorinating unit 10 to flow out the drain pipe 144 and to reduce thepressure in the dome. The non-return valve 160 prevents a flow of waterfrom the water main 80 from reaching the chlorinating unit 10. The domeis removed and additional tablets are placed in the container 16. Thisreplenishment as outlined above is performed without interrupting theflow of water in the water main 80.

Lime deposits can be removed from the apparatus by opening the valve 142to release the pressure in the unit, which also flushes out some of thelime, and by removing the non-return valve 160 by screwing off the cap168, at which time the lime deposits may be physically removed.

Utilizing an apparatus described above, 5000 gallons of water can bechlorinated per charge at 60 pounds/ square inch of pressure without theneed for additional air being pumped into the dome. And 200,000 gallonsof water can be chlorinated per charge at 100 pounds/- square inch ofpressure with the assistance of air being pumped into the dome. It hasalso been determined that a flow of as low as 2 gallons of water perminute can be chlorinated at 1 part per million.

While one advantageous embodiment has been chosen to illustrate theinvention, it will be understood by those skilled in the art thatvarious changes and modifications can be made therein without departingfrom the scope of the invention as defined in the appended claims.

I claim:

1. An apparatus for chlorinating water, the combination comprising; i

a pipe means adapted to have water flowing under pressure therein;

a chlorinating unit containing hypochlorite tablets;

a first conduit means for conducting water from said pipe means to saidchlorinating unit;

a second conduit means for conducting a chlorinated solution of waterfrom said unit to said pipe means;

a valve means in said pipe means for diverting a portion of said waterflow into said first conduit means;

said chlorinating unit including a container means for supporting saidtablets,

a base, having an inlet bore communicating with said first conduit andan outlet bore communicating with said second conduit,

a tube means centrally carried by said base and communicating with saidinlet bore in said base and said container means for conducting waterfrom said inlet bore to said container means and supporting saidcontainer a substantial distance above said base.

a conical distribute means, mounted at one end of said tube means andlocated within said container means, for directing water flowing up saidtube means into contact with said tablets,

a plurality of orifices located in said container means adjacent thebottom thereof and in substantially the same horizontal plane as saiddistributor means, and

dome means removably mounted to said base and enclosing said tube meansand said container means for pressurizing said chlorinating unit;

said apparatus being operative so that water is diverted into saidcontainer means from said pipe means along said first conduit, saidinlet bore and said tube means by operation of said valve means and suchwater contacts and dissolves said tablets forming a chlorinated solutionwhich solution flows through said orifices, through said outlet, saidsecond conduit and back into said pipe means,

said container means being formed as a right cylinder having an open endat the top and a closed end at the bottom, said closed end having acentral bore therein receiving said tube means, and

said container means further including an annular support surface whichis solid and flat and is supported abovesaid closed end, said supportsurface supporting said tablets said orifices being located in the sideof said container means above said annular support surface.

2. An apparatus according to claim 1 and further including a weirlocated in said base for diverting the water flow from said inlet boreto said tube means.

3. An apparatus according to claim 2 and further including a by-passorifice means in said weir communicating at one end with said tube meansand at the other end with said outlet, allowing water to flow from saidinlet and out said outlet without traveling through said container meansfor varying the amount of hypochlorite dissolved.

4. An apparatus according to claim 3 and further including means forvarying the cross-sectional area of said by-pass orifice means in saidweir for further varying the dosage of hypochlorite.

5. An apparatus according to claim 4 and further including means forintroducing pressurized air into said unit to prevent the tablets frombein submerged.

6. A chlorinating unit operative, upon coupling to a source of waterflowing under pressure in a pipe, to chlorinate the water in the pipe,said unit comprising;

a container means for supporting hypchlorite tablets;

a base, having an inlet communicating with said pipe and an outletcommunicating with said pipe;

a tube means centrally carried by said base and having one endcommunicating with said base and the other end communicating with saidcontainer means for conducting water from said inlet to said containermeans and supporting said container a substantial distance above saidbase.

a conical distributor means connected to said tube means at its otherend fordirecting water into contact with said tablets;

a plurality of orifices located in said container means adjacent thebottom thereof and in substantially the same horizontal plane as saiddistributor means;

dome means mounted to said base and enclosing said tube means and saidcontainer means for pressurizing the unit;

weir means located in said base for diverting water flow from said inletinto said tube means; and

a by-pass orifice means located in said weir means for conducting waterfrom said tube means directly into said outlet;

said unit being operative so that water flowing from said pipe into saidinlet strikes said weir means and is diverted into said tube means, afirst portion thereof flowing through said by-pass orifice means and outsaid outlet and a second portion thereof flowing through said tube meansand said distributor means into contact with and dissolving saidtablets, said second portion then flowing through said orifices and outsaid outlet, both of said portions returning to said pipe,

said container means being formed as a right cylinder having an open endat the top and a closed end at the bottom, said closed end having acentral bore therein receiving said tube means, and

said container means further including an annular support surface whichis solid and flat and is supported above said closed end, said supportsurface supporting said tablets, said orifices being located in the sideof said container means above said annular support surface.

7. A unit according to claim 6 and further including means for varyingthe cross-sectional area of said bypass orifice means for varying thedosage of hypochlorite.

8. A unit according to claim 7 and further including a land located insaid base carrying said inlet bore,

a vertical bore in said land adjacent said weir means wherein said meansfor varying the cross-sectional area of said by-pass orifice meansincludes a sleeve rigidly connected to the wall of said bore and havingan aperture therein coinciding with said bypass orifice means,

a tube rotatably received in said sleeve and having an aperture thereincoinciding with said aperture in said sleeve, wherein rotation of saidtube moves the aperture therein relative to the aperture in said tube.

9. An apparatus according to claim 1, wherein said distributor meansincludes a conical portion disposed above said support surface and adepending tube portion projecting through said annular support surface.

10. An apparatus according to claim 9, wherein said base has acylindrical surface and a land and a weir therein,

said inlet bore passes perpendicularly through the exterior of saidcylindrical surface through said land and terminates short of said weir,

said tube means communicates with said inlet bore via a cylindrical boreformed in said land, the axis of said cylindrical bore beingperpendicular to the axis of said inlet bore, and said dome means isspaced from said container means.

1. AN APPARATUS FOR CHLORINATING WATER, THE COMBINATION COMPRISING; APIPE MEANS ADAPTED TO HAVE WATER FLOWING UNDER PRESSURE THEREIN; ACHLORINATING UNIT CONTAINING HYPOCHLORITE TABLETS; A FIRST CONDUIT MEANSFOR CONDUCTING WATER FROM SAID PIPE MEANS TO SAID CHLORINATING UNIT; ASECOND CONDUIT MEANS FOR CONDUCTING A CHLORINATED SOLUTION OF WATER FROMSAID UNIT TO SAID PIPE MEANS; A VALVE MEANS IN SAID PIPE MEANS FORDIVERTING A PORTION OF SAID WATER FLOW INTO SAID FIRST CONDUIT MEANS;SAID CHLORINATING UNIT INCLUDING A CONTAINER MEANS FOR SUPPORTING SAIDTABLETS, A BASE, HAVING AN INLET BORE COMMUNICATING WITH SAID FIRSTCONDUIT AND AN OUTLET BORE COMMUNICATING WITH SAID SECOND CONDUIT, ATUBE MEANS CENTRALLY CARRIED BY SAID BASE AND COMMUNICATING WITH SAIDINLET BORE IN SAID BASE AND CONTAINER MEANS FOR CONDUCTING WATER FROMSAID INLET BORE TO SAID CONTAINER MEANS AND SUPPORTING SAID CONTAINER TOSUBSTANTIAL DISTANCE ABOVE SAID BASE. A CONICAL DISTRIBUTE MEANS,MOUNTED AT ONE END OF SAID TUBE MEANS AND LOCATED WITHIN SAID CONTAINERMEANS, FOR DIRECTING WATER FLOWING UP SAID TUBE MEANS INTO CONTACT WITHSAID TABLETS, A PLURALITY OF ORIFICES LOCATED IN SAID CONTAINER MEANSADJACENT THE BOTTOM THEREOF AND IN SUBSTANTIALLY THE SAME HORIZONTALPLANE AS SAID DISTRIBUTOR MEANS, AND DOME MEANS REMOVABLY MOUNTED TOSAID BASE AND ENCLOSING SAID TUBE MEANS AND SAID CONTAINER MEANS FORPRESSURIZING SAID CHLORINATING UNIT; SAID APPARATUS BEING OPERATIVE SOTHAT WATER IS DIVERTED INTO SAID CONTAINER MEANS FROM SAID PIPE MEANSALONG SAID FIRST CONDUIT, SAID INLET BORE AND SAID TUBE MEANS BYOPERATION OF SAID VALVE MEANS AND SUCH WATER CONTACTS AND DISSOLVES SAIDTABLETS FORMING A CHLORINATED SOLUTION WHICH SOLUTION FLOWS THROUGH SAIDORIFICES, THROUGH SAID OUTLET, SAID SECOND CONDUIT AND BACK INTO SAIDPIPE MEANS, SAID CONTAINER MEANS BEING FORMED AS A RIGHT CYLINDER HAVINGAN OPEN END AT THE TOP AND A CLOSED END AT THE BOTTOM, SAID CLOSED ENDHAVING A CENTRAL BORE THEREIN RECEIVING SAID TUBE MEANS, AND SAIDCONTAINER MEANS FURTHER INCLUDING AN ANNULAR SUPPORT SURFACE WHICH ISSOLID AND FLAT AND IS SUPPORTED ABOVE SAID CLOSED END, SAID SUPPORTSURFACE SUPPORTING SAID TABLETS SAID ORIFICES BEING LOCATED IN THE SIDEOF SAID CONTAINER MEANS ABOVE SAID ANNULAR SUPPORT SURFACE.
 2. Anapparatus according to claim 1 and further including a weir located insaid base for diverting the water flow from said inlet bore to said tubemeans.
 3. An apparatus according to claim 2 and further including aby-pass orifice means in said weir communicating at one end with saidtube means and at the other end with said outlet, allowing water to flowfrom said inlet and out saId outlet without traveling through saidcontainer means for varying the amount of hypochlorite dissolved.
 4. Anapparatus according to claim 3 and further including means for varyingthe cross-sectional area of said by-pass orifice means in said weir forfurther varying the dosage of hypochlorite.
 5. An apparatus according toclaim 4 and further including means for introducing pressurized air intosaid unit to prevent the tablets from bein submerged.
 6. A chlorinatingunit operative, upon coupling to a source of water flowing underpressure in a pipe, to chlorinate the water in the pipe, said unitcomprising; a container means for supporting hypchlorite tablets; abase, having an inlet communicating with said pipe and an outletcommunicating with said pipe; a tube means centrally carried by saidbase and having one end communicating with said base and the other endcommunicating with said container means for conducting water from saidinlet to said container means and supporting said container asubstantial distance above said base. a conical distributor meansconnected to said tube means at its other end fordirecting water intocontact with said tablets; a plurality of orifices located in saidcontainer means adjacent the bottom thereof and in substantially thesame horizontal plane as said distributor means; dome means mounted tosaid base and enclosing said tube means and said container means forpressurizing the unit; weir means located in said base for divertingwater flow from said inlet into said tube means; and a by-pass orificemeans located in said weir means for conducting water from said tubemeans directly into said outlet; said unit being operative so that waterflowing from said pipe into said inlet strikes said weir means and isdiverted into said tube means, a first portion thereof flowing throughsaid by-pass orifice means and out said outlet and a second portionthereof flowing through said tube means and said distributor means intocontact with and dissolving said tablets, said second portion thenflowing through said orifices and out said outlet, both of said portionsreturning to said pipe, said container means being formed as a rightcylinder having an open end at the top and a closed end at the bottom,said closed end having a central bore therein receiving said tube means,and said container means further including an annular support surfacewhich is solid and flat and is supported above said closed end, saidsupport surface supporting said tablets, said orifices being located inthe side of said container means above said annular support surface. 7.A unit according to claim 6 and further including means for varying thecross-sectional area of said by-pass orifice means for varying thedosage of hypochlorite.
 8. A unit according to claim 7 and furtherincluding a land located in said base carrying said inlet bore, avertical bore in said land adjacent said weir means wherein said meansfor varying the cross-sectional area of said by-pass orifice meansincludes a sleeve rigidly connected to the wall of said bore and havingan aperture therein coinciding with said by-pass orifice means, a tuberotatably received in said sleeve and having an aperture thereincoinciding with said aperture in said sleeve, wherein rotation of saidtube moves the aperture therein relative to the aperture in said tube.9. An apparatus according to claim 1, wherein said distributor meansincludes a conical portion disposed above said support surface and adepending tube portion projecting through said annular support surface.10. An apparatus according to claim 9, wherein said base has acylindrical surface and a land and a weir therein, said inlet borepasses perpendicularly through the exterior of said cylindrical surfacethrough said land and terminates short of said weir, said tube meanscommunicates with said inlet bore via a cylIndrical bore formed in saidland, the axis of said cylindrical bore being perpendicular to the axisof said inlet bore, and said dome means is spaced from said containermeans.